Can't say too much about good or bad confo from those pics, he needs to be level and square to really see what's what.
BUT! I see a Saddlebred, long skinny neck (normal), long back (normal for them) and withers that would make bareback impossible. What's he crossed with? I like his eye and what I can see of his face/head. Can't comment on any other part really because of the pic.
There are some very nice features to this horse but his over riding poor feature negates what is good. This is his coupling and back. He is sway backed with a long and weak coupling and the entire horse is too long. This is in conjunction with a high set to his tail which results in a pelvic tip forward.. adding stress to the weak coupling. You can try to help this by long trots up long hills with you in a two point and the horse on a loose rein. This means riding and doing this 4-6 days a week for life..
The other negative is at the other end of the horse where the neck ties in very low to the chest. The result of this, along with the high tail set, is a horse that is down hill in body. The hill work mentioned above will be the only way to get the horse physically able to achieve even a remote semblance of shift of weight to the hind quarters and some collection.
All that said, the topline of the neck ties nicely into his withers. His legs have adequate bone. His knees and hocks are well placed and from the stifle down I like his hind leg.
Try trotting up long hills and repost photos in 6 months. I think you can help him be better than he is.